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Finding the Fourth Proportional to 2,879.75, 4,320.65 and 1,419.94

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Solution

The fourth proportional to 2,879.75, 4,320.65 and 1,419.94 is: 2,130.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.75 : 4,320.65 = 1,419.94 : x
  2. Step 2: Convert to fraction form
    2,879.75/4,320.65 = 1,419.94/x
  3. Step 3: Cross multiply
    2,879.75x = 4,320.65 × 1,419.94
  4. Step 4: Simplify right side
    2,879.75x = 6,135,035.06
  5. Step 5: Solve for x
    x = 6,135,035.06/2,879.75
  6. Step 6: Final answer
    x = 2,130.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.